The Radical Firearms 300 AAC Blackout HBAR barreled pistol-length gas system AR-15 upper receiver is a flat-top law-enforcement grade drop-in upper that is ready to be mounted to any MIL-SPEC AR-15 lower receiver. This fully MIL-SPEC compliant upper receiver provides a high-quality AR-15 upper for every level of shooter.

This Radical Firearms complete upper comes assembled and includes a forward assist, shell deflector, ejection port door and barrel nut. Radical Firearms even included one of their high-quality bolt carrier groups and charging handle. The 15" HBAR profile barrel is covered by a 15" Radical Firearms hybrid KeyMod handguard and finished off with an A2 flash hider.